chore: import upstream snapshot with attribution

apps/sim/lib/billing/upgrade-reasons.test.ts

@@ -0,0 +1,40 @@
+/**
+ * @vitest-environment node
+ */
+import { describe, expect, it } from 'vitest'
+import {
+  buildUpgradeHref,
+  isUpgradeReason,
+  UPGRADE_REASON_COPY,
+  UPGRADE_REASONS,
+} from '@/lib/billing/upgrade-reasons'
+
+describe('upgrade-reasons', () => {
+  it('has copy for every reason', () => {
+    for (const reason of UPGRADE_REASONS) {
+      const copy = UPGRADE_REASON_COPY[reason]
+      expect(copy.header).toMatch(/^Upgrade to scale/)
+      expect(copy.noun.length).toBeGreaterThan(0)
+      expect(copy.warningSubject.length).toBeGreaterThan(0)
+      expect(copy.reachedSubject.length).toBeGreaterThan(0)
+    }
+  })
+
+  it('uses Emir’s header wording', () => {
+    expect(UPGRADE_REASON_COPY.seats.header).toBe('Upgrade to scale with your teammates')
+    expect(UPGRADE_REASON_COPY.tables.header).toBe('Upgrade to scale your tables')
+    expect(UPGRADE_REASON_COPY.storage.header).toBe('Upgrade to scale your storage')
+  })
+
+  it('builds hrefs with and without a reason', () => {
+    expect(buildUpgradeHref('ws-1')).toBe('/workspace/ws-1/upgrade')
+    expect(buildUpgradeHref('ws-1', 'tables')).toBe('/workspace/ws-1/upgrade?reason=tables')
+  })
+
+  it('guards known reasons', () => {
+    expect(isUpgradeReason('storage')).toBe(true)
+    expect(isUpgradeReason('seats')).toBe(true)
+    expect(isUpgradeReason('bogus')).toBe(false)
+    expect(isUpgradeReason(null)).toBe(false)
+  })
+})